tool to stop MT32 sound

jotd · 21 February 2021, 15:12

When quitting a whdload game with quitkey on a sierra MT32 game when MT32 replay is active, the sound remains.

Is there a command to send (using serial.device) to stop the midi sound?

tolkien · 21 February 2021, 16:39

Perhaps sending a midi controller message.
Those are three bytes.
First byte is status byte and channel, second byte is controller number and third byte value.

I´ll try with "All Sound Off" or "All Notes Off" messages.

All Sound Off:
B0 78 00

All Notes Off:
B0 7B 00

Hope it helps.

jotd · 21 February 2021, 18:39

it does. What is really funny is that when restarting whdload on any game that uses kickstart, the sound stops... It means that kickstart stops midi at startup.

Is there a way to do that programmatically using serial.device ?

tolkien · 21 February 2021, 19:36

I have only do midi stuff with camd.library but anyway, you only have to send those bytes and the mt32 knows what to do...I hope!

tolkien · 21 February 2021, 20:34

I have made a quick test in amiblitz with my raspberry mt32 emu and...doesnt work.
MT32 is pre general midi and perhaps doesnt understand those commands.
Will have to look a solution. :/

Galahad/FLT · 21 February 2021, 20:37

Is it enough to open and then close serial device?

jotd · 21 February 2021, 20:46

@Galahad: worth a try.

tolkien · 21 February 2021, 20:48

Sorry...dont know what happend before.
Yes, open serial, send "b0 7b 00" and close serial.
But I think you have to send it to each channel.
"b0 7b 00"
"b1 7b 00"
"b2 7b 00"
"b3 7b 00"
...

tolkien · 21 February 2021, 21:03

Jotd...could you test a file I uploaded to the zone?

jotd · 21 February 2021, 22:56

yeah. It works very well! thanks. Maybe you could share the source? Bert could be interested in integrating it with whdload

In the meantime, integrating it to s:whdload-cleanup works fine.

tolkien · 21 February 2021, 23:14

I have code it in a hurry in amiblitz but I'll post it tomorrow so someone can code it in a proper manner.

Happy it works for you.

Wepl · 23 June 2021, 00:51

The latest WHDLoad beta contains a workaround for this problem. The sound should be stopped on exit.
http://www.whdload.de/whdload/whd187.lha

cloverskull · 23 June 2021, 02:52

Not sure if this is useful information but I have a hardware PC hooked up to a hardware MT32 and I frequently have this problem as well

jotd · 23 June 2021, 09:33

@Wepl: that's great!

@cloverskull I'm sure there are tools to stop the MT32 from your PC. Of course whdload will be of no help here

spudje · 23 June 2021, 14:14

This is originally for MT32-Pi, but maybe it has some command included you can use as well https://github.com/gmcn42/mt32-pi-control

cloverskull · 23 June 2021, 19:14

Quote:

Originally Posted by jotd

@cloverskull I'm sure there are tools to stop the MT32 from your PC. Of course whdload will be of no help here

Yep, noted! :P My intent here was to suggest that this isn’t an issue unique to WHDLoad but rather seems to be common to the MT32 in general.

slaapliedje · 09 July 2021, 07:07

This is an actual bug in the MT32, and it does it on pretty much every platform. Can be rather annoying and as pointed out, it can be worked around.

jotd · 09 July 2021, 08:27

Bert has added this feature in whdload now.

21 February 2021, 15:12	#1
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	tool to stop MT32 sound When quitting a whdload game with quitkey on a sierra MT32 game when MT32 replay is active, the sound remains. Is there a command to send (using serial.device) to stop the midi sound?

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21 February 2021, 16:39	#2
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	Perhaps sending a midi controller message. Those are three bytes. First byte is status byte and channel, second byte is controller number and third byte value. I´ll try with "All Sound Off" or "All Notes Off" messages. All Sound Off: B0 78 00 All Notes Off: B0 7B 00 Hope it helps.

21 February 2021, 18:39	#3
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	it does. What is really funny is that when restarting whdload on any game that uses kickstart, the sound stops... It means that kickstart stops midi at startup. Is there a way to do that programmatically using serial.device ?

21 February 2021, 19:36	#4
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	I have only do midi stuff with camd.library but anyway, you only have to send those bytes and the mt32 knows what to do...I hope!

21 February 2021, 20:34	#5
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	I have made a quick test in amiblitz with my raspberry mt32 emu and...doesnt work. MT32 is pre general midi and perhaps doesnt understand those commands. Will have to look a solution. :/

21 February 2021, 20:37	#6
Galahad/FLT Going nowhere Join Date: Oct 2001 Location: United Kingdom Age: 50 Posts: 8,986	Is it enough to open and then close serial device?

21 February 2021, 20:46	#7
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	@Galahad: worth a try.

21 February 2021, 20:48	#8
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	Sorry...dont know what happend before. Yes, open serial, send "b0 7b 00" and close serial. But I think you have to send it to each channel. "b0 7b 00" "b1 7b 00" "b2 7b 00" "b3 7b 00" ...

21 February 2021, 21:03	#9
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	Jotd...could you test a file I uploaded to the zone?

21 February 2021, 22:56	#10
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	yeah. It works very well! thanks. Maybe you could share the source? Bert could be interested in integrating it with whdload In the meantime, integrating it to s:whdload-cleanup works fine.

21 February 2021, 23:14	#11
tolkien AmigaMan Join Date: Oct 2012 Location: Castro Urdiales/Spain Posts: 760	I have code it in a hurry in amiblitz but I'll post it tomorrow so someone can code it in a proper manner. Happy it works for you.

23 June 2021, 00:51	#12
Wepl Moderator Join Date: Nov 2001 Location: Germany Posts: 866	The latest WHDLoad beta contains a workaround for this problem. The sound should be stopped on exit. http://www.whdload.de/whdload/whd187.lha

23 June 2021, 02:52	#13
cloverskull Registered User Join Date: Sep 2018 Location: California Posts: 322	Not sure if this is useful information but I have a hardware PC hooked up to a hardware MT32 and I frequently have this problem as well

23 June 2021, 09:33	#14
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	@Wepl: that's great! @cloverskull I'm sure there are tools to stop the MT32 from your PC. Of course whdload will be of no help here

23 June 2021, 14:14	#15
spudje Registered User Join Date: Dec 2014 Location: Netherlands Posts: 1,406	This is originally for MT32-Pi, but maybe it has some command included you can use as well https://github.com/gmcn42/mt32-pi-control

09 July 2021, 07:07	#17
slaapliedje Registered User Join Date: Jul 2010 Location: Utah, USA Posts: 516	This is an actual bug in the MT32, and it does it on pretty much every platform. Can be rather annoying and as pointed out, it can be worked around.

09 July 2021, 08:27	#18
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,161	Bert has added this feature in whdload now.

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